<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div onclick="increase">
    <span class="text">文本</span>
    <button>我是按钮</button>
  </div>
  <script>
    var vnode = {
      tag: '',
      props: {},
      children: {}
    }
  </script>
</body>
</html>